Tamil
Nadu Information 
Population in Tamilnadu
The
current estimated world human population is 6,350,538,084.There
is no complete database on the world's population,
and humans are constantly being born (at the rate
of about 3 per second) and dying. However, it is clear
that the world's population continues to grow, and
at rates that are unprecedented prior to the 20th
century. By some estimates, there are now one billion
young people in the world between the ages of 15 and
24.
When
was six billion reached?
The United Nations Population Fund designated October
12, 1999 as the approximate day on which world population
reached six billion. This was about 12 years after
world population reached five billion, in 1987.
Rate of population increase:
The last 70 years of the 20th century saw the biggest
increase in the world's population in human history.
The following table shows when each billion milestone
was met:
1 billion reached in 1802.
2 billion reached in 1927.
3 billion reached in 1961.
4 billion reached in 1971.
5 billion reached in 1987.
6 billion reached in 1999.
From
the figures above, the world's population tripled
in 72 years, and doubled in 38.
The UN estimated in 2000 that the world's population
was then growing at the rate of 1.2 percent (or 77
million people) per year. This represents a decrease
in the growth rate in 1990, mostly due to decreased
birth rates.
Every
year the world's population gains nearly 90 million
people, as of 2004.
 |
Forecast of world population:
The future growth of population is difficult
to predict. Birth rates are declining slightly
on average, but vary greatly between developed
countries (where birth rates are often at or
below replacement levels) and developing countries.
Death rates can change unexpectedly due to disease,
wars and catastrophes, or advances in medicine.
The UN itself has issued multiple projections
of future world population, based on different
assumptions. |
The
current projections from the UN's Population Division,
from their 2002 World Population Prospects database
[1], are:
Year
Population (billions)
2010 6.8
2020 7.5
2030 8.1
2040 8.6
2050 8.9
History Of Tamilnadu ---- Stateculture
